(a(i))[1]
Describe why rotating the tube alters the pressure of the gas at the sealed end.
(a(ii))[3]
Explain, using ideas about particles, why the pressure of the gas drops when its volume increases.
(b)[3]
In Fig. 3.1, the mercury column has length $0.30\,\text{m}$. Mercury’s density is $14\,000\,\text{kg m}^{-3}$. Atmospheric pressure is $1.0 \times 10^{5}\,\text{Pa}$. Calculate the pressure of the gas in the tube.
(c)[2]
A different gas sample changes pressure while temperature is kept constant. Fig. 3.3 includes a point, X, on a graph of pressure against volume for this sample. At X the gas pressure is $P_0$ and its volume is $V_0$. On Fig. 3.3, sketch the graph as the gas pressure falls from $2P_0$ to $\frac{1}{2}P_0$.